Reversible bed frame

ABSTRACT

A reversible bed frame with a horizontal and an inclined position is disclosed herein. Its angular disposition is transformed from horizontal to inclined by turning it upside down. The bed frame preferably comprises multiple load-bearing elements (140) that are connected to and between two side rails (110) thus providing a top surface (150) and a bottom surface (210) of rectangular shape, with both surfaces able to withstand a load. Elevating members (120, 130) provide elevation for both surfaces. In accordance with one embodiment, the elevating members are of varying height so that the top surface is horizontal when facing upwards and the bottom surface is inclined when facing upwards. In accordance with another embodiment, different measurements and positioning of the load-bearing elements provide a horizontal top surface and an inclined bottom surface.

CROSS-REFERENCE TO RELATED APPLICATIONS

Not Applicable

BACKGROUND OF THE INVENTION

The therapeutic benefits of sleeping on an incline have been known for centuries—archeological evidence suggests that some Ancient Egyptians slept on inclined beds, where the head end of these beds was higher than the foot end.

Some of these benefits may include improvement in blood circulation, metabolism, respiratory, neurological and immune function, alleviation of symptoms associated with Alzheimer's, migraines, multiple sclerosis, diabetes, sleep apnea, acid reflux, varicose veins and more, alteration of intracranial pressure so that the glymphatic drainage is improved—by pumping spinal fluid through the brain's tissues, the glymphatic system flushes waste from the brain back into the circulatory system and onto the liver for elimination. When considering younger children, disturbed sleep due to nasal congestion is a common issue, and as a mother of two, I have observed improvement in my children's breathing when the head of the bed is raised.

In plants, the interplay between gravity and varying density of fluids is what causes the sap to circulate up and down in a perpetual loop, and the same mechanism appears to apply to human biology as well. Thus, sleeping on a full-body incline is not the same as sleeping on a partially inclined surface where only the upper body is elevated. A full-body incline provides proper alignment so that a person's blood may circulate freely throughout the whole body, while at the same time no additional stress is put on the hip joint, which is a common concern with partial-body inclines.

Numerous patents have been issued involving methods of providing a full-body incline.

Some of these methods employ the use of an accessory that is placed directly on a bed frame and below a mattress or a mattress base. U.S. patent 53,706 to Tucker (1866) describes a mechanism that allows elevation through the use of a bar, and the mechanism is then locked in place by a dog and ratchet. The assembly described in U.S. patent 70,448 to Mabett (1867) provides head elevation through the implementation of split slats and wedge-shaped blocks. In U.S. patent 234,303 to Libby (1880) the invention involves a slide mechanism that moves a set of slats to a chosen elevation. Other such accessories with more complex mechanisms are described in U.S. Pat. No. 3,259,921 to Alsobrook (1966), U.S. Pat. No. 4,715,073 (1987) and 4,856,129 (1989) to Butler, and U.S. Pat. No. 4,934,007 to Sweet (1990).

Other methods may provide more elaborate mechanisms, such as the one described in U.S. patent 964,105 to Hogan and Meinecke (1910), which may be more suitable for hospital settings. A simpler approach is found in U.S. patent 448,209 to Chorlton and Scott (1891), which mentions the possibility of switching the legs on one end of a camping bed with legs of different height, thus obtaining a head elevation.

However, such bed frames and assemblies suffer from a number of disadvantages. Their manufacture requires the use of a variety of components, which may result in high costs of materials. The construction is rather complex, requiring precision, skillfulness, and more time to make and assemble. To obtain the inclined position the user must either perform several steps, such as unlocking, adjusting the incline, and relocking, or the bed frame or assembly must be designed to use a power source for automating the process. When not used properly the moving parts and/or mechanisms may present a safety hazard of pinched fingers or more serious injuries, especially with younger children.

There are also alternative methods that do not rely on mechanisms but instead involve the use of a wedge-like inclined mattress. For example, patent US 2010/0122418 A1 to Adler describes a full-body auxiliary mattress that may be placed on top of or in place of a regular mattress. A disadvantage of this method is the necessity for additional storage when the inclined mattress is not needed. In the case of an inflatable mattress a pump may be required, in combination with extra time of inflation and deflation.

BRIEF SUMMARY OF THE INVENTION

A reversible bed frame that can transform its angular disposition from horizontal to inclined by turning it upside down is described herein.

The reversible bed frame comprises multiple load-bearing elements that are connected to and between two side rails thus providing a top surface and a bottom surface of rectangular shape, with both surfaces able to withstand a load, for example of a mattress and a human. Several elevating members provide elevation for both surfaces. In accordance with one embodiment the elevating members are of varying height so that the top surface is horizontal when facing upwards and the bottom surface is inclined when facing upwards. In accordance with another embodiment different measurement and positioning of the load-bearing elements provide a horizontal top surface and an inclined bottom surface.

Accordingly several advantages of one or more aspects of my invention are as follows: to provide bed frames with a horizontal and an inclined position that are durable, inexpensive, and simple to construct; that are single-step and easy to operate; that are safe and reliable to sleep on for persons of almost any age, through a construction that does not require any movable parts or mechanisms; that do not require additional storage for unused components. These and other advantages of one or more aspects will become apparent from a consideration of the drawings and ensuing description.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

FIG. 1 shows a perspective view in the horizontal position of a first embodiment.

FIG. 2 shows a perspective view in the inclined position of the first embodiment.

FIG. 3 shows an orthogonal view in the horizontal position of the first embodiment, with details on the relationship between various measurements.

FIG. 4 shows an exploded perspective view in the horizontal position of the first embodiment, with details on example fixtures.

FIG. 5 shows a perspective view in the horizontal position of a second embodiment.

FIG. 6 shows a perspective view in the inclined position of the second embodiment.

FIG. 7 shows an orthogonal view in the horizontal position of the second embodiment, with details on possible positioning of the load-bearing elements.

DETAILED DESCRIPTION OF THE INVENTION First Embodiment—FIGS. 1, 2, 3, and 4

Referring to FIG. 1 and FIG. 2, a perspective view of one embodiment is shown, in the horizontal position in FIG. 1 and in the inclined position in FIG. 2.

The opposite ends of two side rails 110 are connected to a first elevating member, or leg 120 and to a second leg 130, forming a rectangular shape. Multiple load-bearing elements 140 are rigidly connected to and between side rails 110, thus providing a top mattress-support surface 150, as shown in FIG. 1, and a bottom mattress-support surface, as shown in FIG. 2. A conventional mattress 160 is shown, which can be placed either on top surface 150 or on bottom surface 210.

FIG. 3 shows an orthogonal view of this embodiment. Load-bearing elements 140 are positioned along the length of side rails 110, with gaps 310 in between. Gaps 310 should be less than 6 cm when a conventional mattress (not shown) is placed directly onto top surface 150 or onto bottom surface 210 to prevent the mattress from sagging.

Leg 120 and leg 130 extend below bottom surface 210 to an equal length so that when facing upwards top surface 150 is horizontal. Leg 120 and leg 130 also extend above top surface 150 so that when facing upwards bottom surface 210 is inclined at a predetermined angle 320.

A bed length 330 is the usable length for placing a conventional mattress (not shown) onto load-bearing elements 140. A bottom elevation 340 is equal to the shortest distance between top surface 150 and the lower end of leg 130. A foot elevation 350 is equal to the shortest distance between the upper end of leg 130 and bottom surface 210. A head elevation 360 is equal to the shortest distance between the upper end of leg 120 and bottom surface 210.

The values for angle 320, bed length 330, bottom elevation 340, foot elevation 350, and head elevation 360 depend upon the needs and comfort of the user. Referring to angle 320, a value between 2.5° and 3.5° provides a gentle incline and may be particularly suitable for children, while a higher value may be more beneficial for adults. The value of angle 320 should not be greater than around 7°. Bed length 330 is determined by the desired mattress size. Lower values for bottom elevation 340 and foot elevation 350 provide a bed frame that is safer for use by younger children. Higher values may be more comfortable for adults. To ensure airflow, the value for bottom elevation 340 should not be lower than around 1 cm. This recommendation may vary and depends upon the type of surface on which the bed frame will be placed.

An elevation difference 370 is the difference between head elevation 360 and foot elevation 350. When bed length 330 and angle 320 have been determined, the value for elevation difference 370 may then be calculated using the tangent ratio, as shown below:

tangent(angle 320)=elevation difference 370/bed length 330

Referring now to FIG. 4, this embodiment is shown in an exploded perspective view. Leg 120 and leg 130 are shown having notches 410 on two opposite ends. Notches 410 are of such shape and size to accommodate the opposite ends of side rails 110. To determine the exact positioning of notches 410 the reader may refer to paragraphs [0024] through [0026] also taking into consideration the thickness of load-bearing elements 140, which depends on intended use and choice of materials.

While notches 410 may provide adequate vertical support, load-bearing elements 140 may be further secured to leg 120 and leg 130 by bed bolts 420. The use of a rigid but non-permanent connection, such as bed bolts 420, is convenient as it allows disassembly.

In alternative to notches 410, side rails 110 may be connected to leg 120 and leg 130 by bed bolts, pocket-hole joinery, tongue and groove joints, mortise and tenon joints, or the like. Under appropriate circumstances, considering such issues as user preferences, structural requirements, cost, etc., other connection and/or attachment arrangements such as, for example, glue, latches, pins, screws, dowels, dovetail joints, etc., may be sufficient.

Side rails 110 are shown having multiple mortises 430 that are positioned on the inner side along the length of each side rail 110. The number of mortises 430 on each side rail 110 is equal to the number of load-bearing elements 140. Mortises 430 are of such shape and size to accommodate either the opposite ends of load-bearing elements 140 directly or tenons thereof. The depth of mortises 430 should be sufficient so that additional means of support for load-bearing elements 140 may be omitted. To permit disassembly, load-bearing elements 140 may be inserted into mortises 430 without the use of glue or other permanent fixture.

In alternative to a mortise/tenon joint, load-bearing elements 140 may be attached to side rails 110 employing additional elements, for example upright fitting plates, which can be positioned to provide support for load-bearing elements 140 from above and from below. Under appropriate circumstances, considering such issues as user preferences, structural requirements, cost, etc., other connection and/or attachment arrangements such as, for example, glue, bolts, pocket-hole joinery, latches, pins, screws, dowels, dovetail joints, etc., may be sufficient.

When considering the choice of materials for the construction of the reversible bed frame, it should be noted that a suitable material is solid wood, which has many advantages, such as being readily available, simple to work with, and usually economical. However other materials may be used, for example, metal, medium density fiber, particleboard, plastic, etc., or a combination thereof.

Second Embodiment—FIGS. 5, 6, and 7

A perspective view of another embodiment is shown in the horizontal position in FIG. 5 and in the inclined position in FIG. 6.

FIG. 7 shows an orthogonal view. Load-bearing elements 140 are positioned along the length of side rails 110 in a way that top surface 150 is horizontal. The height of each load-bearing element 140 gradually decreases from one end of the bed frame to the other so that bottom surface 210 is inclined at angle 320.

OPERATION OF THE INVENTION

A human may change the angular disposition of the reversible bed frame from horizontal to inclined by turning it upside down.

CONCLUSION

While my above description contains many specificities, these should not be construed as limitations of the scope, but rather as an exemplification of embodiments thereof. Many other modifications and variations are possible that achieve substantially equivalent results, all of which are intended to be embraced within the spirit and scope of the invention. Accordingly, the scope should be determined not by the embodiments illustrated, but by the appended claims and their legal equivalents. 

What is claimed is:
 1. A bed frame, comprising: two side rails; one or more load-bearing elements; and two or more elevating members; wherein the load-bearing elements being rigidly connected to and between the side rails, thus providing a top surface and a bottom surface of rectangular shape and of sufficient resistance to withstand a load, for example of a mattress and a human; wherein the bottom surface is parallel to the upper surface; wherein the elevating members being rigidly connected to the side rails, and extending above the top surface and below the bottom surface; wherein each elevating member having a predetermined height, such that the top surface is horizontal when facing upwards, and the bottom surface is inclined when facing upwards whereby a human may transform the angular disposition of the bed frame from horizontal to inclined by turning it upside down.
 2. The bed frame of claim 1 wherein the load-bearing elements are rigidly connected to the side rails by means of mortises and tenons.
 3. The bed frame of claim 1 wherein the bottom surface, when facing upwards, is inclined at a predetermined angle from about 2 degrees to about 7 degrees.
 4. A bed frame, comprising: two side rails; one or more load-bearing elements; and two or more elevating members; wherein the load-bearing elements being rigidly connected to and between the side rails, thus providing a top surface and a bottom surface of rectangular shape and of sufficient resistance to withstand a load, for example of a mattress and a human; wherein the bottom surface is inclined relative to the top surface; wherein the elevating members being rigidly connected to the side rails, and extending above the top surface and below the bottom surface; whereby a human may transform the angular disposition of the bed frame from horizontal to inclined by turning it upside down.
 5. The bed frame of claim 4 wherein the load-bearing elements are rigidly connected to the side rails by means of mortises and tenons.
 6. The bed frame of claim 4 wherein the bottom surface is inclined at a predetermined angle from about 2 degrees to about 7 degrees. 